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Finding the Fourth Proportional to 1,087,603.92, 1,631,959.92 and 769,798.80

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Solution

The fourth proportional to 1,087,603.92, 1,631,959.92 and 769,798.80 is: 1,155,090.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,087,603.92 : 1,631,959.92 = 769,798.80 : x
  2. Step 2: Convert to fraction form
    1,087,603.92/1,631,959.92 = 769,798.80/x
  3. Step 3: Cross multiply
    1,087,603.92x = 1,631,959.92 × 769,798.80
  4. Step 4: Simplify right side
    1,087,603.92x = 1,256,280,788,064.10
  5. Step 5: Solve for x
    x = 1,256,280,788,064.10/1,087,603.92
  6. Step 6: Final answer
    x = 1,155,090.35

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.